Structural element especially suitable for solar greenhouses and the like

ABSTRACT

A structural arrangement is provided which is particularly useful in connection with solar greenhouses. The structural member is provided as a hollow bar of elongated form provided with at least one longitudinally extending track channel having a relatively narrow longitudinally extended slot-mouth. The bar may be provided with two such channels substantially circular in cross-section with the mouths defining reentrant angles. In a solar greenhouse, members of the above type support a glazing with a curved-eave section, the bars being curved to shape and the channels therein accommodating the bulbous lateral edges of shades which are retained therein.

OTHER APPLICATIONS

This application is a divisional application based on my earlier filedco-pending application, Ser. No. 455,475, filed Jan. 4, 1983.

FIELD OF INVENTION

This invention relates to improvements in solar greenhouses and the likeand more particularly to improved structural members suitable forproviding guidance for shading and like types of members.

BACKGROUND

Solar greenhouses may be elegantly designed and proportioned tocomplement the beauty of a dwelling. They provide a versatile form ofadditional living space that can capture and store solar energy.Provision is thus made for a practical addition which confines a placein the sun for gardening, dining, lounging and so forth. In fact, suchadditional spaces have been used for accommodating hot tubs and spaaccoutrements and the like.

Commercial systems are available for providing selective shading forsolar greenhouses and the like. In one known arrangement, a shade istransferred from one motor driven towards a second motor driven rollerby straps which are fastened to the leading edge of a shade, thesestraps being attached to one of the rollers and being wound upon thesame to draw the shade from the other roller upon which the shade iscoiled and normally stored. In addition, the leading edge of the shadeis provided in the form of a rigid member, the edges of which are guidedin a channel provided in a guiding member which has no structuralfunction and is intended solely for the purpose of being a shade guide.

An inspection of the available system reveals that the leading rigidelement of the aforegoing system extends laterally beyond the lateraledges of the shade so that the lateral edges of the shade are spacedfrom the guide and thus provide means for an inadvertent passage ofsolar radiation or the like between the guides and the shade edges. Itis also to be noted that the guides have no structural function to beperformed as has been noted hereinabove, and that the guides aregenerally mounted inwardly of the solar greenhouse structure in such amanner as to be readily receptive of inadvertent damaging forces or thelike. Moreover, it will be noted that the shade is inconvenientlypositioned with its lateral edges subject to damage deterioration.

SUMMARY OF THE INVENTION

It is a general object of the invention to provide improved systems andstructural members to enable the selective shading and shielding ofsolar greenhouses and the like inclusive of, but not limited to, theselective erection of shielding walls relative to swimming pools andother such accommodations.

It is a further object of the invention to provide improved structuralelements suitable for use in solar greenhouses and the like in order toprovide for ready installation of shading systems and glazing.

Yet another object of the invention is to provide for improvedinsulating and shading systems for solarium type greenhouses and thelike utilizing integral built-in tracks to carry shading fabric so thatthe fabric may be readily held taut between two such tracks without sag.

Still another object of the invention is to provide an insulating andshading system for solar greenhouses including curved eave portions inwhich the insulating shade fabric travels from, for example, a top ridgearound the curved eave-section to a bottom sill without the interventionof guide rollers adjacent the curved-eave section.

Yet another object of the invention is to provide an insulating andshading system wherein intergral built-in track channels are madeaccessible at the top and bottom of the tracking system by improveddesigning of the structural members into which the integral tracks areincorporated.

It is yet a further object of the invention to provide for amultiplicity of shade panels which may be activated simultaneously orselectively in correspondence with panels incorporated into a solargreenhouse construction.

Still another object of the invention is to provide an insulating andshading system designed to provide a maximum insulation and sun shadingas well as such privacy as may be desirable in a glass structure and toaccomplish these results with the least obtrusive and amount of visibleparts.

It is an additional object of the invention to provide an improvedtracking system which fixes the spacing between an associated glazingarrangement and shading system to minimize the possibility of damage tothe glazing.

It is still a further object of the invention to provide for theincorporation of improved track channels into a structural member toprovide in turn for ready displacement for a shade or shielding fabricor the like through a curved-eave portion in such a manner as toeliminate the need for associated guide rollers or other surplusstructure, thereby simplifying the construction of shading andinsulating systems and minimizing the cost thereof.

In achieving the above and other objects of the invention, there isprovided a structural member constituted of an elongated hollow barprovided with at least one longitudinally extending track channel havinga relatively narrow longitudinally extending slot-type mouth.Adventageously, the bar is provided with a second track channel andmouth, arranged in mirror image relationship to the aforesaid channeland mouth and opening in opposite direction with respect to the same.

In accordance with a preferred embodiment of the invention, the channelsare substantially circular in cross-section and the mouths definereentrant angles therewith. Preferably, the mouths also have widthswhich are no more than about 50% of the diameters of the channels.

In a specific embodiment of the invention, the bar is generallyquadrilateral in shape and includes two pairs of parallel sides, saidmouths being located in the sides of one pair. The sides of the otherpair are provided with screw grooves.

In accordance with a further aspect of the invention, one of the sidesof the aforesaid other pair is provided with at least one channeladapted for receiving a sealing member. A sealing member may be arrangedin the latter said channel and a glazing member may be provided to restagainst the sealing member. The glazing member will be held against thestructural member by a muntin or the like arranged to rest against theglazing member, there being provided a fastening device extendingthrough the muntin into the corresponding screw groove.

In accordance with a specific feature of the aforesaid structuralmember, each of the channels which are provided for tracking is at leastpartly defined by two interior walls. One of these interior walls hastwo opposed surfaces conforming to the shape of the correspondingchannel, and the other of the interior walls has two opposed surfaces,one of which conforms to the shape of the corresponding channel and theother of which is flat.

The aforesaid structural member may be incorporated into, for example, asolar greenhouse construction. This solar greenhouse construction may,in accordance with the invention, comprise a glazing support means tosupport said glazing in a conformation to define a at least partlyenclosed space, said glazing being permeable to solar radiation to allowthe radiation to pass into the space, there being provided a shade meansin the space adapted for being positioned adjacent at least part of theglazing to intercept at least part of the radiation passing through theglazing. The support means includes at least one of the aforesaidstructural members and is provided with at least one track channel inwhich the shade means is engaged and by which the shade means is guidedalong the glazing. Thus, the invention distinguishes from what has beenpreviously available in that it provides for incorporating a trackchannel into a structural member with the shade means being directlyengaged by and incorporated into the structural members of thegreenhouse.

According to various aspects of the invention, the shade means mayinclude a roller and a shade coupled to the same and being adapted forbeing rolled onto tha unrolled from the roller. The invention alsoincorporates the commercially available arrangement whereby a motor isprovided within the roller to drive the same. In accordance with oneembodiment of the invention, the shade means may include rollers spacedvertically along the glazing with a shade being coupled to each of therollers and adapted for being drawn from one of the rollers towards theother of the rollers. As has been implied hereinabove, the glazingpreferably includes a curved-eave portion along which extends the abovenoted support means and the aforesaid channel or channels.

The invention in one form provides for a support means which includes atleast two spaced and parallel glazing bars supporting and spanned by atleast part of the glazing. Each of these glazing bars is provided, inthe form noted above, with at least one of the above-described trackchannels. The track channels in the bars are aligned in parallel withthe shade extending between the two channels and being held tautthereby. The shade means or shade may include parallel bulbousperipheries engaged in respective of the channels and, in thisarrangement, the channels are provided with relatively narrow slot-typemouths opening from the bars whereby to admit the entry of the shademeans and to entrap the bulbous peripheries in these channels. As apossible alternative, or included in the arrangement generally describedhereinabove, the shade means may include cables extending through andbeyond these bulbous peripheries, the cables extending as well throughthe channels in a manner which is peculiarly distinguishable from thearrangement which is known from the prior art.

In accordance with yet another aspect of the invention there is provideda horizontal sill below and supporting the aforesaid support means withthe roller arranged at the bottom of the support means being containedwithin the sill and coupled to the shade means. The shade means mayinclude a plurality of parallel shades with the support means includinga plurality spaced parallel glazing bars each provided with two of theafore-described track channels, said channels being arranged incooperating pairs between which extend respective of the shades.

Advantageously the invention provides for a fixed spacing between theglazing and the associated shades. This advantage is developed from thefact that the structural member includes both the tracking channels andthe means for supporting the glazing. Preferrably, this spacing is aminimum of about 11/2 inches thereby providing for a most suitableaccommodation of the glazing and minimizing possibilities of damage tothe same.

In accordance with further features of the invention there is providedan arrangement of generally horizontal cap members covering theaforesaid drain and extending between the aforesaid bars, said capmembers including break away sections covering the slots at least inpart. The bars extend downwardly past the cap members and includelateral walls, each provided with one of the aforesaid track channelsopening into the aforesaid internal chamber. As has been noted above,the aforesaid bars may be hollow members, each including two of theaforesaid lateral walls and inner and outer walls extending between thelateral walls and forming inner and outer corners therewith. The barsmay include internal thickened portions constituted by interior wallslocated at the inner corners and defining in part, the aforesaid trackchannels. The above-noted inner walls may each be provided with avertical slot between the aforesaid channels, said vertical slot beingbounded by serrated or screw threaded walls whereby to facilitateengagement of an attachment or fastening member or the like. The basesill of the invention may be provided with at least one internalhorizontal groove constituting a drainage channel.

The ridge structure to be described in greater detail hereinbelow isprovided for engaging the support means at the upper end of the same.The rige structure has preferably a vent provided therein with a blowerarranged in the ridge structure and adapted for displacing air frombetween the shade means and the glazing and expelling the air outwardlythrough the vent.

The support means includes glazing bars of the type which have beengenerally described above and the glazing bars may include ends cut atan angle to define a spaced with the ridge structure to permit theappropriate positioning of a guide roll which will be located at leastpartly in the space defined with the ridge structure to guide the shadesuch that the lateral edges thereof are received in and guided by thetrack channels of the glazing bars. The above and other objects,features and advantages of the invention will be found in the detaileddescription which follows hereinbelow as illustrated in the accompanyingdrawing.

BRIEF DESCRIPTION OF THE DRAWING

In the Drawing:

FIG. 1 is an interior perspective view of a portion of a lean-two typesolar greenhouse provided with a shading arrangement in accordance witha preferred embodiment of the invention;

FIG. 2 is a partly diagrammatic and perspective view of a broken-awayportion of the bottom sill construction embodied in the structure ofFIG. 1 in correspondence with line A--A in FIG. 1;

FIG. 3 is a view of the ridge structure of FIG. 1 in correspondence withline B--B therein, the view being on a large scale and being partiallydiagrammatic in nature;

FIG. 4 is a partially diagrammatic view corresponding section line B--Bof FIG. 1; and

FIG. 5 is a sectional view corresponding to line C--C in FIG. 1 butfurther illustrating a glazing and muntin connected thereto.

DETAILED DESCRIPTION

In FIG. 1 is illustrated a portion of a lean-two type solar greenhouseof the kind generally in the 1982 Theme Catalog entitled Four SeasonsPassive Solar Greenhouse and Sun Space published and distributed byFours Seasons Solar Corp. of Farmingdale, N.Y. The illustrated portionof the solar greenhouse in FIG. 1 includes a gable end 10 and a frontportion 12 having a curved-eave portion 14 and an upper sloped portion16. Further illustrated are base sills 18 and 20 which may, for example,be mounted on a base wall or flat slab or deck (not shown) withappropriate fasteners. The method of mounting the base sill on thesupporting ground is not a feature of the present invention and requiresno further description in this text. The gable end 10 includes aplurality of parallel vertical glazing bars such as indicated at 22, 24,and 26. The bar 26 is abutting relationship against the side of adwelling or some other such similar construction. The front portion 12includes a plurality of vertical glazing bars 28, 30, 32, 34 and 36. Theglazing bar 36 furthermore provides a connection with gable end 10.

To conform with the shape of the glazing, which it is the purpose of theglazing bars to support, the glazing bar 28 has a curved section 38 anda sloped section 40. It terminates in an end portion 42. Glazing bars28, 30, 32, 34 and 36 have similar curved and sloped portions.

Glazing panes as comprised by the gable end 10 are indicated in variousforms at 44, 46, 48, 50, 52, 54 and 56. Portions of the glazing areconcealed by shade fabric as indicated at 58, 60 and 62. The dwelling orother structure against which the solar greenhouse is mounted is notshown as its construction is not essential to an understanding of thepresent invention.

The glazing included in the front portion 12 includes glazing panes 70,72, 74 and 76. The remaining glazing in FIG. 1 is concealed by shadefabric or shades 80, 82, 84 and 86. The number of shades and panels inFIG. 1 is illustrative only as a greater or lesser number of panels andglazing panes may be employed in accordance with the invention which isnot limited thereby.

At the upper end of the solar greenhouse construction, is located aridge structure 90. It engages the end portion of the glazing bars atthe upper extremities thereof such as indicated at 42 to support andaccommodate the same. The ridge structure 90 abuts at the back wall 92against the dwelling other similar structure associated therewith asdoes the vertical glazing bar 26 of the gable end 10.

Also appearing in FIG. 1 is a representative sequence of rollers 94, 96,98 and 100. These rollers in the illustrated embodiment are sourcerollers of shade fabric which store and supply the rolled up shadefabric upon demand. Further illustrated in FIG. 1 is a guide roll 102which guides the shades or shade fabric in a change of direction so thatthe edges of these shades or fabrics may be engaged in track channelsprovided in the vertical glazing bars as will be described in greaterdetail hereinbelow. It is to be noted in the diagrammatic illustrationof source rollers 94, 96, 98 and 100 that interior motor 110, 112, 114and 116 are shown. These motors are contained and concealed within therollers and operate to drive the same. Rollers with internal motors todrive the same are commercially available. They may be obtained fromSomfy Systems, Inc. of Edison, N.J. The motors are of a asynchronouscapacitor start and run, single phase type rated as 120 V. and 60 Hz.They are thermally protected totally enclosed brushless type motorsequipped with permanently lubricated bearings requiring no maintenanceand being relatively easy to wire. They include solenoid activated discbrakes which automatically stop and hold a load in any position withoutslippage whenever current to the motor is interrupted. The lockingaction assures safety and reliability of operation of the motorizedsystem. The system can be provided with a limit switch to set the exactlength of travel in both up and down directions automatically. Aplanetary type gear system is employed to lower motor speed and improvetorque. Other details of the motor system can be found in U.S. Pat. No.3,718,215.

The upper motorized rollers cooperate with corresponding motorizedrollers concealed in the base sill 18. In the illustration, onemotorized system is exposed by the cutaway such as, for example, seen at120. The arrangement is such that, when the rollers in the sill 18 areoperated to draw shade fabric downwardly, the motorized roller systemsindicated at 94, 96, 98 and 100 permit the withdrawing of shadestherefrom. The electrical system and operation is reversed when theshades 80, 82, 84 and 86 are to be drawn upwardly. In this case, themotorized systems indicated at 94, 96, 98 and 100 are actuated and theconcealed systems in the base sill 18 release the material for beingrolled back upon the upper rollers to expose greater and greater amountsof the glazing as the operation continues. Also illustrated in FIG. 1,in diagrammatic form, is a photoelectric sensor 126. This photoelectricsensor is coupled in an electric circuit (not shown) connected with theaforementioned motors in order to drive the same in one or the otherrotary directions as may be required. The photoelectric sensor 126 isrepresentative only of any device capable of sensing an ambientcondition such as solar radiation, temperature, wind and the like forpurposes of automating the operation of the rollers. It will be noted,however, that, while the motorized roller systems are employed inaccordance with the preferred embodiment of the invention, it is alsopossible that the shades be operated manually and also in connectionwith spring-loaded rollers as is the case in connection with domesticshades as are commonly and commercially available. In fact, a manuallyoperated shade arrangement is indicated in association with end 10.Thus, there are no upper rollers associated with shades 58, 60 and 62,these being drawn from concealed rollers in base sill 20 by a manualoperation of grasping rigid leading edge members indicated by way ofexample at 130, 132 and 134.

Also exposed in the illustration of FIG. 1 in diagrammatic form is ablower 140. The puspose of this blower (as will be illustrated anddescribed in greater detail hereinbelow) is to evacuate air from betweenthe shade and the associated glazing and to expel this air into theambient atmosphere via an appropriate vent in order to reduce thetemperature which prevails between the shades and the glazing thereby toreduce the possibility of damage to the glazing.

FIG. 2 illustrates on an enlarged scale a broken-away portion of thestructure illustrated in FIG. 1 with conditions somewhat altered to showa more lowered condition of the shades. For purposes of orientation, itwill be seen in FIG. 2 that there are illustrated base sill 18, verticalglazing bar 30 and shades 80 and 82. The base sill 18 includes an innerwall 150 and a first outer wall 152. The outer wall 152 supports asloped upper wall 154 from which extends a vertical wall 156. The walls154 and 156 cooperate to define a moisture drain 158. A bottom wall 160extends between and connects the inner wall 150 with the outer wall 152.Drainage channels 162 and 164 are provided in horizontal dispositionwithin the internal chamber 166 which is cooperatively defined by walls150, 152, 154 and 160. Within the chamber 166 is accommodated themotorized roller system including the internal motor 170 and theencircling roller 172. Each of the shades illustrated includes a bulbouslateral edge portion for purposes of being accommodated in and guided bytrack channels to be referred to hereinbelow.

Illustrative bulbous lateral edge portions or peripheries are indicatedat 176 and 178 in FIG. 2. These constructions are commercially availableand are generally of the type including wires extending through thebulbous peripheries and axially extending out of the same. Two suchwires or cables are indicated at 180 and 182 in FIG. 2. They extendthrough and are guided by track channels 184 and 186 as will bedescribed in greater detail hereinbelow. It is to be noted that, byreason of break-away portion 188, it is possible to see that thesecables are attached to and wound onto roller 172 such as indicated 190and 192. A winding up of these cables on the roller 172 causes theshades 80 and 82 to be drawn down towards the base sill 18 thereby toeffect a greater degree of shading. This means that solar radiationpassing through the glazing which is permeable thereto may beintercepted by the shades thereby to effect a greater or lesser degreeof shielding as desired and as may be manually or automaticallycontrolled. It will also be noted in FIG. 2 that the shades 80 and 82are provided with rigid lead members 196 and 198. These members, attheir extreme downward movement, come into abutting or substantiallyabutting relationship with cap elements 200 and 202 which are intendedto cover drains such as indicated at 158 and to conceal the internalconstruction of the base sill 18 from viewing or from the damagingimpact of dropped articles or the like. The caps 200 and 202 alsoconstitute safety features inasmuch as they resist the penetration ofprobing fingers and the like which might otherwise be damaged byengagement with moving parts within the base sill 18 under inadvertentcircumstances.

The cap members 200 and 202 extend generally from the vertical wall 156to the upper lip 204 of the front wall 150. This is satisfactory in thecase where the cables, such as indicated 180 and 182, extend through theglazing bar to the internal roller 172 which in this case acts take-uproller. In these circumstances, there is no need for the lead members196 and 198 to move into the internal chamber 166 nor is there any needfor the shade 80 or 82 to do likewise. In the event that it is desiredto alter the construction so that the shade 80 and 82 can be directlytaken-up on the roller 172 in addition to the cables 180 and 182 whichthey trail, the construction can be readily modified to provide a slotthrough which the shade 80 and 82 may pass. Thus, for example, the capmember 200 is provided with a notch 210 providing a break-away section212 to expose a slot or passage 214 illustrative of a passageway throughwhich the shades may enter the internal chamber 166 for engagement andbeing taken-up upon an associated roller. Thus, the invention includesthe options whereby it is exclusively the cables which are taken-up onthe lowermost roller or rollers or whereby the shades themselves aretaken-up upon such roller or rollers.

FIG. 2 furthermore illustrates a second outer wall 220. This outer wallincludes a protrusion 222 in facing relationship with a protrusion 224on the outer wall 152. These two protrusions are provided with facinggrooves 226 and 228 which have reentrant angles therein so that athermal break member 230 having the form of a Maltese cross may beentrapped therein to prevent the flow of heat from the wall 152 to thewall 220.

The glazing is illustratively shown in the form of a double paned glassor plastic structure, the spaced panes being indicated at 240 and 242with a spacing 244 therebetween To maintain this spacing, there isprovided a spacer 246. The pane 242 rests against the vertical wall 156and the glazing as a whole is entrapped between the wall 156 and 220 bymeans of a gasket 250 of a theremally insulative type. The upper wallsof protrusions 222 and 224 define a platform at 252 and 254 upon whichrests a pad 256 upon which rest the glazing and the spacer 246.

Further reference to the construction of the vertical glazing bar 30will be made hereinbelow since the construction of this bar and otherlike bars in the structure constitute a significant feature of theinvention, especially as regards the provision of the track channels 184and 186. Before this discussion is undertaken, however, reference willnext be made to FIGS. 3 and 4 which illustrate, in greater detail and/ordiagrammatically, some of the features of the ridge structure 90appearing in FIG. 1. For purposes of orientation, attention is drawn inFIGS. 3 and 4 to vertical glazing bar 30, shades 80 and 82, motorizedroller system 94, guide roll 102 and blower system 140 which have beenmentioned hereinabove.

From what has been stated above, it will now be obvious that the glazingbars constitute supporting members or structures for the glazing. Thesesupporting members are accommodated in and rest against the ridgestructure 90. They provide track channels for receiving and guiding therespective shades. The ridge member 90 is structurally and functionallyrelated therewith in a manner next to be described below.

Ridge structure 90 includes a rear wall 300 consisting of upper andlower parts 302 and 304. The upper and lower parts are connected throughthe intermediary of a thermal break member 306 which is made ofinsulative material accommodated in appropriate receptacles 308 and 310respectively provided on the upper and lower parts 302 and 304. Theridge structure 90 also include upper wall 312 and lower wall 314.Moreover, it includes a front wall indicated at 316. Cooperatively,these walls define an internal chamber 318 within which is accommodatedthe blower 140.

The front wall 316 is provided with a vent indicated generally at 320.Associated with this vent is a removable shutter 322 which may beemployed, for example, during cold weather seasons to shut off theescape of air from within the solar greenhouse. The front wall 316 hasan auxiliary portion 324 connected thereto through the intermediary of athermal break member 326. This auxiliary member 324 supports areceptacle 328 which is a glazing receptacle to accommodate and supportappropriate glazing panels at the upper extremity of the front portionof the glazing of the solar greenhouse. An exemplary panel isdiagrammatically illustrated at 330. It may consist of spaced panes 332and 334 separated, for example, by a spacer 336. The panel 330 is heldin place by a gasket shown at 338. A screen for preventng the influx ofinsects and the like is indicated at 340. It is associated with the vent320. A second vent is indicated at 342. Cooperating therewith is agravity operated flap 344 which likewise prevents the influx of foreignmatter. The strength of the flow of air passing outwardly through thevent 342 is sufficient to open the flap 344 to the extent required.

FIG. 4 specifically illustrates the flow of air. Flow through the vent320 is indicated by arrows 350 and 352. Flow of air through vent 342 isindicated by arrow 354. The circuitous route is indicated by dotted linepath 356. It will now be noted that the utilization of the glazing barwith its track channels 184 and 186 and the function of supporting theassociated glazing defines a space between the shades and glazing. Thisspace is indicated in FIG. 4 at S. This spacing S is a minimum of about11/2 inches. It is intended to assist in limiting the temperature whichair entrapped between the glazing and shade may reach. This function isfurther accomplished by the utilization of the blower 140 whichdisplaces or withdraws air from between the glazing and the shades andpropels this air along the route 356 through the vent 320 and expelsthis air into ambient atmosphere through the vent 342. The the ridgestructure and its blower cooperate with the glazing bar and the shadesin both a structurally supportative and temperature controlling manner.

It will now be noted that the end portion 360 at the upper extremity ofthe glazing bar 30 has an extremity indicated at 362 which is angularlyrelated both to the longitudinal axis of bar 30 and to the rear wall 304of the ridge structure 90. This is intended to provide a space 364within which to accommodate at least a partial intrusion of the guideroll 102. Thus the guide roll 102 may be conveniently positioned toguide the shade 80 from the roller system 94 into the associated trackchannels.

Similarly, the bottom extremity of the glazing bar 30 as indicated at366 in FIG. 2 is angularly related to the walls between which itextends. The purpose of this angular construction is different from thatof the upper extremity. It is intended to provide an appropriaterelationship with the drain 158 thereby to permit a proper resting ofthe bottom extremity of bar 130 on the upper wall 154 and to permit anease in installing the glazing bar 30 when the structure is beingassembled.

An examination of FIG. 5, which is in part, a section of glazing bar 30,will next be undertaken in conjunction with an understanding of FIGS. 2,3, and 4. In FIG. 5 appears the track channels 184 and 186. By referenceto the other figures, it will be understood that these channels extendlongitudinally through the glazing bar which is itself an extendedmember. Associated with the channel 184 is a mouth 400. Associated withthe track channel 180 is a mouth 402. These mouths are of relativelyrestricted dimensions. They form and constitute slots extendinglongitudinally along the glazing bar 30. The track channels 184 and 186are in a preferred embodiment of the invention preferably of circularconformation. An example diameter of these track channels is indicatedat D. The width of the associated mouths is indicated by way of exampleof W. The arrangement is such, that the width W is preferably no morethan 50% of the dimension D. This, in effect, forms a reentrant angleindicated, by way of example, at A. The purpose of this is to form atrack channel in which the bulbous periphery of the associated lateraledges of the corresponding shades are entrapped. This entrapment coupledwith appropriate spacing of pairs of associated glazing bars enables theshades to be held in taut condition thereby avoiding sagging and thelike. It also enables the bulbous portions to be vigorously guided alongappropriate paths even as these paths turn through an angle associatedwith the curved eave portions of the overall construction. Thus the useof associated guide rolls or the like in the vicinity of the curved eaveportions is avoided.

It will be noted that the glazing bar includes two side walls 404 and406. These side walls extend between and connect inner wall 408 andouter wall 410. The arrangement of the wall is such that the glazing baris in its preferred form quadrilateral in cross-section thereby definingfour corners indicated in the drawing at 412, 414, 416 and 418. Thetrack channels 184 and 186 are generally located at the corners 416 and418. They are furthermore formed by interior walls indicated at 420,422, 424 and 426. The walls 420 and 424, which partly define channels184 and 186, have surfaces 428 and 430 which are flat. They also havesurfaces 432 and 434 which conform to the shape of the channels. On theother hand, wall 422 has surfaces 436 and 438 both of which conform tothe shape of the associated channel. Wall 428 likewise has surfaces 440and 442 which conform to the shape of the associated channel 186.

In the wall 408 is provided a screw threaded groove 450. By means ofthis groove, attachments of various types may be provided by fasteningmembers threadably engaged therein to provide for the connection orhanging of various types of auxiliary members or elements on theinterior of the solar greenhouse. A corresponding grooved slot 452 isprovided in wall 410. This provides for the utilization of fasteningmember 454 to sandwich glazing panes, for example, 456 and 458 againstthe supporting structure by means of a muntin 460 or clamping memberwhich is entrapped by the head 462 to sandwich the glazing against thesealing members 464 and 466 accommodated in sealing receptacles 468 and470 mounted on the outer wall 410 and constituting an integral partthereof. It will be further more noted that the wall 410 is providedwith drainage grooves 472 and 474. The provision of these sealingreceptacles and drainage has been heretofore available, but never inassociation with track channels and never for the partial purpose forextablishing a rigid spacing therebetween so as to provide a welldefined spacing between a glazing and a associated shade arrangement asin accordance with the present invention.

Reference to FIG. 2 will show the orientation of screw threaded grooves450 and 452 as well as seals 464 and 466 accommodated in theirrespective receptacles. The illustration will also show the orientationof drainage grooves 472 and 474. Not heretofore mentioned with respectto FIG. 2 is the chamber 480 defined between outer walls 152 and 220.This provides an accommodation for the upper extremity of flashing 482the purpose of which is to provide a weather seal as between the bottomof the base sill 18 and the exterior supporting ground or other suchconstruction.

Reference to FIG. 3 will likewise show the orientation of screw theadedgrooves 450 and 452 as well as of sealing members 464 and 466 as well asdrainage grooves 472 and 474.

From what has been stated above, it will be readily understood that thesupport arrangement of the invention, when utilized in connection withglazing or the like includes a plurality of spaced parallel glazingbars, each provided with two of the afore described track channels.These track channels are arranged in cooperating pairs and in paralleland are such that respective shades extend between these channels withthe bulbous peripheries of the shades being entrapped in slidableengagement therein.

Attention is especially directed, in addition, to the horizontal basesill arrangement of the invention wherein is provided a sloped upperwall and a vertical wall extending along and upwardly from the slopedwall to define a moisture drain therewith with the vertical glazing barsincluding angled lower extremities accommodated in the drain formedtherby such that the lower extremities of the glazing bars and the drainhaving matching profiles. Attention is furthermore drawn drain havingmatching profiles. Attention is furthermore drawn to the fact that thesill includes a base and inner and outer walls extending upwardly fromthe base and defining with the upper wall and internal chamber, theupper wall extending in cantilever manner from the outer wall andterminating short of the inner wall to define a slot therewith throughwhich the shade or the cables associated therewith can pass into theinternal chamber.

Attention is furthermore directed to the generally horizontal capmembers which are provided covering the drain and extending between theglazing bars, these cap members including break-away sections coveringthe slot at least in part and being disposable in order to provide foringress of the shading fabric.

It will be noted that in accordance with the invention, a plurality orsequence of coaxially aligned rollers or roller segments may be providedin the internal chamber of the sill, the rollers or roller segmentsbeing respectively located between respective pairs of the vertical barsto receive and accommodate a plurality of shades or shade pannels whichare respectively coupled thereto. Alternatively, a single roller may beprovided to extend past a plurality of the vertical glazing bars withthe shade panels being connected thereto for simultaneous operationthereby.

There will now be obvious to those skilled in the art many modificationsand variations of the constructions and elements set forth hereinabove.These modifications and variations will not depart from the scope of theinvention if defined by the following claims.

What is claimed is:
 1. A structural arrangement comprising an elongatedhollow bar provided with a first longitudinally extending track channelhaving a relatively narrow longitudinally extending slot-type mouth,said bar being provided with a second track channel and mouth arrangedin mirror image relationship to said first channel and the first saidmouth and opening in opposite direction to the latter, the channelsbeing substantially circular in cross-section and the mouths definingreentrant angles therewith, the bar being generally quadrilateral inshape and having four corners and including two pairs of parallel sides,said mouths being located in respective of the sides of one pairadjacent two of said corners, the sides of the other pair being providedwith screw grooves, one of the sides of said other pair being providedwith at least one channel adapted for receiving a sealing member, saidstructural arrangement further comprising a sealing member in the lattersaid channel, a glazing member against the sealing member, a muntinagainst the glazing member, and a fastening means extending through themuntin into the corresponding screw groove.
 2. A structural arrangementas claimed in claim 1 wherein the glazing member is spaced from thefirst and second track channels by at least about one and one-halfinches.